Hi,
Not sure if there were ever Kickstart ROMs / floppies produced with localisation (certainly, all the Amigas from English-speaking countries I've seen have had the same ROMs).
However, the Workbench software could be localised in varying amounts ranging from basic support in 1.3 through to more substantial localisation in 3.x. Even in this case, I believe the contents of the floppy disk media was the same in terms of available files, etc. - just configured different for each supported locale.
For example, a German Amiga might use a standard 1.3 ROM, with a Workbench disk localised for the German keymap, etc., but a simple matter to edit the preferences/Startup-Sequence to turn it into an English one.
- Ali